Sorry we are at cross purposes - if Jet2 offered cheaper fares from MME than LBA/NCL, yes they would draw passengers from LBA and NCL, but I agree with you that Jet2 would be daft to do it. There is a small market that will always chose MME if flights are available because of its location and ease of use, but I can't see that being large enough to sustain a base and would be a significant change from their current approach.